I see the note about Confusing Combatants not applying on Phantasm death, and I agree. Further though, I think the confusion applied by Confusing Combatants is doing zero damage.
Test: Trait Confusing Combatants, then go pull a veteran mob. Kite it, and do nothing but spawn clones as much as you can (Mirror Images, Deceptive Evasion, etc). Clone death should be the only source of confusion. Note that you will see the confusion condition on the mob. That part works! Also note that you never see a single point of confusion damage hit the mob. Now I know it only lasts 3 seconds, and most of the time that will fall off before the mob swings. Keep trying, let the mob catch you… Am I crazy? I swear it never does any damage. Someone confirm please?